Environmental issues

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Across
  1. 4. , 'we're trying to reduce our ... by using our bikes more and the car less'
  2. 6. , 'although we can't see it, the ... protects us from dangerous UV radiation'
  3. 7. , become less common and then disappear.
  4. 8. , 'the ... means our planet is becoming warmer than it should be'
Down
  1. 1. , 'Governments are now more concerned about ..., but they still don't do enough to control economic growth'
  2. 2. , destroy completely.
  3. 3. , if sth ... you don't have any more of it.
  4. 5. , make a tree fall by cutting it.